<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <link rel="stylesheet" href="bootstrap/css/bootstrap.min.css">
    <style>
      /*  p{
            padding: 100px;
            margin:100px;;
        }*/
    </style>
</head>
<body>
    <div class="container">
        <p class="text-muted">Hello,我是kevin</p>
        <p class="text-primary">Hello,我是kevin</p>
        <p class="bg-info">Hello,我是kevin</p>
        <button type="button" class="close" aria-label="Close">
            <span aria-hidden="true">&times;</span>
        </button>
        <span class="caret"></span>

        <div class="pull-left">hello</div>
        <div class="pull-right hidden">hello</div>
    </div>
</body>
</html>